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I Can Haz SDK?
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| ///usr/bin/env jbang "$0" "$@" ; exit $? | |
| //JAVA 17 | |
| //DEPS info.picocli:picocli:4.6.3 | |
| //DEPS info.picocli:picocli-codegen:4.6.3 | |
| //DEPS hu.webarticum:tree-printer:2.0.0 | |
| //DEPS io.vavr:vavr:0.10.4 | |
| import hu.webarticum.treeprinter.SimpleTreeNode; | |
| import hu.webarticum.treeprinter.TreeNode; | |
| import hu.webarticum.treeprinter.printer.listing.ListingTreePrinter; | |
| import io.vavr.control.Validation; | |
| import picocli.CommandLine; | |
| import picocli.CommandLine.Command; | |
| import picocli.CommandLine.Parameters; | |
| import java.io.IOException; | |
| import java.io.InputStream; | |
| import java.net.URL; | |
| import java.util.List; | |
| import java.util.Map; | |
| import java.util.Objects; | |
| import java.util.concurrent.Callable; | |
| import java.util.function.Predicate; | |
| import java.util.function.Supplier; | |
| import java.util.stream.Collector; | |
| import java.util.stream.Stream; | |
| import java.util.zip.ZipEntry; | |
| import java.util.zip.ZipInputStream; | |
| import static io.vavr.Function2.constant; | |
| import static io.vavr.control.Validation.combine; | |
| import static io.vavr.control.Validation.invalid; | |
| import static io.vavr.control.Validation.valid; | |
| import static java.util.stream.Collectors.flatMapping; | |
| import static java.util.stream.Collectors.groupingBy; | |
| import static java.util.stream.Collectors.toList; | |
| import static java.util.stream.Stream.generate; | |
| @Command(name = "ichs", mixinStandardHelpOptions = true, version = "0.1.0", | |
| description = "Checks if an archive is suitable for publication via SDKMAN!.") | |
| class ichs implements Callable<Integer> { | |
| @Parameters(index = "0", description = "The URL where the archive is located.") | |
| private URL url; | |
| public static void main(String... args) { | |
| System.exit(new CommandLine(new ichs()).execute(args)); | |
| } | |
| @Override | |
| public Integer call() throws Exception { | |
| var rootDirectories = rootDirectories(url); | |
| var directoryTree = | |
| rootDirectories | |
| .entrySet() | |
| .stream() | |
| .map(ichs::directoryTree) | |
| .collect(buildTree(lastPathSegment(url.getPath()))); | |
| new ListingTreePrinter().print(directoryTree, new StringBuilder().append(System.lineSeparator())); | |
| var result = combine(hasSingleTopLevelDirectory(rootDirectories), hasBinDirectory(rootDirectories)) | |
| .ap(constant("Your archive is suitable for publication via SDKMAN!")); | |
| return 0; | |
| } | |
| private static Validation<String, String> hasSingleTopLevelDirectory(Map<String, List<String>> directoryTree) { | |
| return directoryTree.size() == 1 ? valid("valid") : invalid("SKDMAN! requires a single, top-level directory."); | |
| } | |
| private static Validation<String, String> hasBinDirectory(Map<String, List<String>> directoryTree) { | |
| return | |
| directoryTree.size() == 1 && | |
| directoryTree | |
| .entrySet() | |
| .stream() | |
| .anyMatch(directory -> | |
| directory.getValue().contains("bin/")) ? | |
| valid("valid") : invalid("SDKMAN! requires a bin/ directory directly underneath the root directly."); | |
| } | |
| private static String lastPathSegment(String path) { | |
| return path.replaceFirst("^.+/", ""); | |
| } | |
| private static TreeNode directoryTree(Map.Entry<String, List<String>> directory) { | |
| return | |
| directory | |
| .getValue() | |
| .stream() | |
| .map(SimpleTreeNode::new) | |
| .collect(buildTree(directory.getKey())); | |
| } | |
| private static Collector<TreeNode, SimpleTreeNode, SimpleTreeNode> buildTree(String content) { | |
| return Collector.of( | |
| () -> new SimpleTreeNode(content), | |
| SimpleTreeNode::addChild, | |
| (left, right) -> { | |
| right.children().forEach(left::addChild); | |
| return left; | |
| } | |
| ); | |
| } | |
| private static Map<String, List<String>> rootDirectories(URL url) throws IOException { | |
| try (var inputStream = new ZipInputStream(newUrlConnectionInputStream(url))) { | |
| return | |
| generate(wrap(inputStream::getNextEntry)) | |
| .takeWhile(Objects::nonNull) | |
| .map(ZipEntry::getName) | |
| .filter(toPredicate(ichs::isDirectory).and(ichs::isAtMostSecondLevel)) | |
| .collect(groupingBy(ichs::rootDirectory, flatMapping(ichs::childDirectory, toList()))); | |
| } | |
| } | |
| private static <T> Predicate<T> toPredicate(Predicate<T> p) { | |
| return p; | |
| } | |
| private static boolean isDirectory(String filename) { | |
| return filename.endsWith("/"); | |
| } | |
| private static boolean isAtMostSecondLevel(String filename) { | |
| return filename.chars().filter(c -> c == '/').count() <= 2; | |
| } | |
| private static boolean isRootDirectory(String filename) { | |
| return filename.matches("^[^/]+/$"); | |
| } | |
| private static String rootDirectory(String filename) { | |
| return filename.replaceFirst("(?<=/)[^/]+/$", ""); | |
| } | |
| private static Stream<String> childDirectory(String filename) { | |
| return isRootDirectory(filename) ? Stream.of() : Stream.of(filename.replaceFirst("^[^/]+/", "")); | |
| } | |
| private static InputStream newUrlConnectionInputStream(URL url) throws IOException { | |
| var connection = url.openConnection(); | |
| connection.connect(); | |
| return connection.getInputStream(); | |
| } | |
| private static <T> Supplier<T> wrap(ThrowingSupplier<T> supplier) { | |
| return () -> { | |
| try { | |
| return supplier.get(); | |
| } catch (Exception e) { | |
| throw new RuntimeException(e); | |
| } | |
| }; | |
| } | |
| @FunctionalInterface | |
| private interface ThrowingSupplier<T> { | |
| T get() throws Exception; | |
| } | |
| } |
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